The answer suggested by Ace is essentially what is needed. My answer just aims to make things a little clearer.
There are two things you need to do. Firstly in the Manifest set the following on the activity. android:windowSoftInputMode="adjustResize"
Then, in the activity's layout you'll want to set a ScrollView beneath the Toolbar/Title Bar, as shown in the code below.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_height="?attr/actionBarSize"
.../>
<ScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
...>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
...>
</RelativeLayout>
</ScrollView>
</RelativeLayout>
From what I understand, here's how it works.
When you open the soft keyboard on your device, it will 'adjustResize' the layout of the activity. As the layout sits in a ScrollView, this is the part which is resized, and made smaller. Therefore the Toolbar/Titlebar will stay in place and the layout in the ScrollView will be scrollable when the keyboard is shown.